drm/radeon: add runtime PM support (v2)

This hooks radeon up to the runtime PM system to enable
dynamic power management for secondary GPUs in switchable
and powerxpress laptops.

v2: agd5f: clean up, add module parameter

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

10 files changed, 299 insertions, 36 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index 986100a6e5ca..ad54525cfa79 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -98,6 +98,7 @@ extern int radeon_lockup_timeout;
 extern int radeon_fastfb;
 extern int radeon_dpm;
 extern int radeon_aspm;
+extern int radeon_runtime_pm;
 
 /*
  * Copy from radeon_drv.h so we don't have to include both and have conflicting
@@ -2212,6 +2213,9 @@ struct radeon_device {
         /* clock, powergating flags */
         u32 cg_flags;
         u32 pg_flags;
+
+        struct dev_pm_domain vga_pm_domain;
+        bool have_disp_power_ref;
 };
 
 int radeon_device_init(struct radeon_device *rdev,
@@ -2673,8 +2677,8 @@ extern void radeon_ttm_placement_from_domain(struct radeon_bo *rbo, u32 domain);
 extern bool radeon_ttm_bo_is_radeon_bo(struct ttm_buffer_object *bo);
 extern void radeon_vram_location(struct radeon_device *rdev, struct radeon_mc *mc, u64 base);
 extern void radeon_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc);
-extern int radeon_resume_kms(struct drm_device *dev, bool resume);
-extern int radeon_suspend_kms(struct drm_device *dev, bool suspend);
+extern int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon);
+extern int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon);
 extern void radeon_ttm_set_active_vram_size(struct radeon_device *rdev, u64 size);
 extern void radeon_program_register_sequence(struct radeon_device *rdev,
                                              const u32 *registers,
diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
index d96070bf8388..6153ec18943a 100644
--- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c
+++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
@@ -59,6 +59,10 @@ struct atpx_mux {
         u16 mux;
 } __packed;
 
+bool radeon_is_px(void) {
+        return radeon_atpx_priv.atpx_detected;
+}
+
 /**
  * radeon_atpx_call - call an ATPX method
  *
diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 43f7600803c3..5a74b173eb79 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -31,6 +31,8 @@
 #include "radeon.h"
 #include "atom.h"
 
+#include <linux/pm_runtime.h>
+
 extern void
 radeon_combios_connected_scratch_regs(struct drm_connector *connector,
                                       struct drm_encoder *encoder,
@@ -641,6 +643,11 @@ radeon_lvds_detect(struct drm_connector *connector, bool force)
         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
         struct drm_encoder *encoder = radeon_best_single_encoder(connector);
         enum drm_connector_status ret = connector_status_disconnected;
+        int r;
+
+        r = pm_runtime_get_sync(connector->dev->dev);
+        if (r < 0)
+                return connector_status_disconnected;
 
         if (encoder) {
                 struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
@@ -666,6 +673,8 @@ radeon_lvds_detect(struct drm_connector *connector, bool force)
         /* check acpi lid status ??? */
 
         radeon_connector_update_scratch_regs(connector, ret);
+        pm_runtime_mark_last_busy(connector->dev->dev);
+        pm_runtime_put_autosuspend(connector->dev->dev);
         return ret;
 }
 
@@ -765,6 +774,11 @@ radeon_vga_detect(struct drm_connector *connector, bool force)
         struct drm_encoder_helper_funcs *encoder_funcs;
         bool dret = false;
         enum drm_connector_status ret = connector_status_disconnected;
+        int r;
+
+        r = pm_runtime_get_sync(connector->dev->dev);
+        if (r < 0)
+                return connector_status_disconnected;
 
         encoder = radeon_best_single_encoder(connector);
         if (!encoder)
@@ -805,9 +819,8 @@ radeon_vga_detect(struct drm_connector *connector, bool force)
                          * detected a monitor via load.
                          */
                         if (radeon_connector->detected_by_load)
-                                return connector->status;
-                        else
-                                return ret;
+                                ret = connector->status;
+                        goto out;
                 }
 
                 if (radeon_connector->dac_load_detect && encoder) {
@@ -832,6 +845,11 @@ radeon_vga_detect(struct drm_connector *connector, bool force)
         }
 
         radeon_connector_update_scratch_regs(connector, ret);
+
+out:
+        pm_runtime_mark_last_busy(connector->dev->dev);
+        pm_runtime_put_autosuspend(connector->dev->dev);
+
         return ret;
 }
 
@@ -888,10 +906,15 @@ radeon_tv_detect(struct drm_connector *connector, bool force)
         struct drm_encoder_helper_funcs *encoder_funcs;
         struct radeon_connector *radeon_connector = to_radeon_connector(connector);
         enum drm_connector_status ret = connector_status_disconnected;
+        int r;
 
         if (!radeon_connector->dac_load_detect)
                 return ret;
 
+        r = pm_runtime_get_sync(connector->dev->dev);
+        if (r < 0)
+                return connector_status_disconnected;
+
         encoder = radeon_best_single_encoder(connector);
         if (!encoder)
                 ret = connector_status_disconnected;
@@ -902,6 +925,8 @@ radeon_tv_detect(struct drm_connector *connector, bool force)
         if (ret == connector_status_connected)
                 ret = radeon_connector_analog_encoder_conflict_solve(connector, encoder, ret, false);
         radeon_connector_update_scratch_regs(connector, ret);
+        pm_runtime_mark_last_busy(connector->dev->dev);
+        pm_runtime_put_autosuspend(connector->dev->dev);
         return ret;
 }
 
@@ -969,12 +994,18 @@ radeon_dvi_detect(struct drm_connector *connector, bool force)
         struct drm_encoder *encoder = NULL;
         struct drm_encoder_helper_funcs *encoder_funcs;
         struct drm_mode_object *obj;
-        int i;
+        int i, r;
         enum drm_connector_status ret = connector_status_disconnected;
         bool dret = false, broken_edid = false;
 
-        if (!force && radeon_check_hpd_status_unchanged(connector))
-                return connector->status;
+        r = pm_runtime_get_sync(connector->dev->dev);
+        if (r < 0)
+                return connector_status_disconnected;
+
+        if (!force && radeon_check_hpd_status_unchanged(connector)) {
+                ret = connector->status;
+                goto exit;
+        }
 
         if (radeon_connector->ddc_bus)
                 dret = radeon_ddc_probe(radeon_connector, false);
@@ -1125,6 +1156,11 @@ out:
 
         /* updated in get modes as well since we need to know if it's analog or digital */
         radeon_connector_update_scratch_regs(connector, ret);
+
+exit:
+        pm_runtime_mark_last_busy(connector->dev->dev);
+        pm_runtime_put_autosuspend(connector->dev->dev);
+
         return ret;
 }
 
@@ -1392,9 +1428,16 @@ radeon_dp_detect(struct drm_connector *connector, bool force)
         enum drm_connector_status ret = connector_status_disconnected;
         struct radeon_connector_atom_dig *radeon_dig_connector = radeon_connector->con_priv;
         struct drm_encoder *encoder = radeon_best_single_encoder(connector);
+        int r;
 
-        if (!force && radeon_check_hpd_status_unchanged(connector))
-                return connector->status;
+        r = pm_runtime_get_sync(connector->dev->dev);
+        if (r < 0)
+                return connector_status_disconnected;
+
+        if (!force && radeon_check_hpd_status_unchanged(connector)) {
+                ret = connector->status;
+                goto out;
+        }
 
         if (radeon_connector->edid) {
                 kfree(radeon_connector->edid);
@@ -1458,6 +1501,10 @@ radeon_dp_detect(struct drm_connector *connector, bool force)
         }
 
         radeon_connector_update_scratch_regs(connector, ret);
+out:
+        pm_runtime_mark_last_busy(connector->dev->dev);
+        pm_runtime_put_autosuspend(connector->dev->dev);
+
         return ret;
 }
 
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index d08ae5be1598..b512c0098ee9 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -101,6 +101,12 @@ static const char radeon_family_name[][16] = {
         "LAST",
 };
 
+#if defined(CONFIG_VGA_SWITCHEROO)
+bool radeon_is_px(void);
+#else
+static inline bool radeon_is_px(void) { return false; }
+#endif
+
 /**
  * radeon_program_register_sequence - program an array of registers.
  *
@@ -1076,6 +1082,10 @@ static bool radeon_switcheroo_quirk_long_wakeup(struct pci_dev *pdev)
 static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
 {
         struct drm_device *dev = pci_get_drvdata(pdev);
+
+        if (radeon_is_px() && state == VGA_SWITCHEROO_OFF)
+                return;
+
         if (state == VGA_SWITCHEROO_ON) {
                 unsigned d3_delay = dev->pdev->d3_delay;
 
@@ -1086,7 +1096,7 @@ static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
                 if (d3_delay < 20 && radeon_switcheroo_quirk_long_wakeup(pdev))
                         dev->pdev->d3_delay = 20;
 
-                radeon_resume_kms(dev, 1);
+                radeon_resume_kms(dev, true, true);
 
                 dev->pdev->d3_delay = d3_delay;
 
@@ -1096,7 +1106,7 @@ static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
                 printk(KERN_INFO "radeon: switched off\n");
                 drm_kms_helper_poll_disable(dev);
                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
-                radeon_suspend_kms(dev, 1);
+                radeon_suspend_kms(dev, true, true);
                 dev->switch_power_state = DRM_SWITCH_POWER_OFF;
         }
 }
@@ -1146,6 +1156,7 @@ int radeon_device_init(struct radeon_device *rdev,
 {
         int r, i;
         int dma_bits;
+        bool runtime = false;
 
         rdev->shutdown = false;
         rdev->dev = &pdev->dev;
@@ -1292,7 +1303,14 @@ int radeon_device_init(struct radeon_device *rdev,
         /* this will fail for cards that aren't VGA class devices, just
          * ignore it */
         vga_client_register(rdev->pdev, rdev, NULL, radeon_vga_set_decode);
-        vga_switcheroo_register_client(rdev->pdev, &radeon_switcheroo_ops, false);
+
+        if (radeon_runtime_pm == 1)
+                runtime = true;
+        if ((radeon_runtime_pm == -1) && radeon_is_px())
+                runtime = true;
+        vga_switcheroo_register_client(rdev->pdev, &radeon_switcheroo_ops, runtime);
+        if (runtime)
+                vga_switcheroo_init_domain_pm_ops(rdev->dev, &rdev->vga_pm_domain);
 
         r = radeon_init(rdev);
         if (r)
@@ -1382,7 +1400,7 @@ void radeon_device_fini(struct radeon_device *rdev)
  * Returns 0 for success or an error on failure.
  * Called at driver suspend.
  */
-int radeon_suspend_kms(struct drm_device *dev, bool suspend)
+int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon)
 {
         struct radeon_device *rdev;
         struct drm_crtc *crtc;
@@ -1457,9 +1475,12 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend)
                 pci_disable_device(dev->pdev);
                 pci_set_power_state(dev->pdev, PCI_D3hot);
         }
-        console_lock();
-        radeon_fbdev_set_suspend(rdev, 1);
-        console_unlock();
+
+        if (fbcon) {
+                console_lock();
+                radeon_fbdev_set_suspend(rdev, 1);
+                console_unlock();
+        }
         return 0;
 }
 
@@ -1472,7 +1493,7 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend)
  * Returns 0 for success or an error on failure.
  * Called at driver resume.
  */
-int radeon_resume_kms(struct drm_device *dev, bool resume)
+int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 {
         struct drm_connector *connector;
         struct radeon_device *rdev = dev->dev_private;
@@ -1481,12 +1502,15 @@ int radeon_resume_kms(struct drm_device *dev, bool resume)
         if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
                 return 0;
 
-        console_lock();
+        if (fbcon) {
+                console_lock();
+        }
         if (resume) {
                 pci_set_power_state(dev->pdev, PCI_D0);
                 pci_restore_state(dev->pdev);
                 if (pci_enable_device(dev->pdev)) {
-                        console_unlock();
+                        if (fbcon)
+                                console_unlock();
                         return -1;
                 }
         }
@@ -1501,9 +1525,11 @@ int radeon_resume_kms(struct drm_device *dev, bool resume)
         radeon_pm_resume(rdev);
         radeon_restore_bios_scratch_regs(rdev);
 
-        radeon_fbdev_set_suspend(rdev, 0);
-        console_unlock();
-
+        if (fbcon) {
+                radeon_fbdev_set_suspend(rdev, 0);
+                console_unlock();
+        }
+       
         /* init dig PHYs, disp eng pll */
         if (rdev->is_atom_bios) {
                 radeon_atom_encoder_init(rdev);
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 7adbb7417dd5..0e52cc532c26 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -30,6 +30,7 @@
 #include "atom.h"
 #include <asm/div64.h>
 
+#include <linux/pm_runtime.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_edid.h>
 
@@ -494,11 +495,55 @@ unlock_free:
         return r;
 }
 
+static int
+radeon_crtc_set_config(struct drm_mode_set *set)
+{
+        struct drm_device *dev;
+        struct radeon_device *rdev;
+        struct drm_crtc *crtc;
+        bool active = false;
+        int ret;
+
+        if (!set || !set->crtc)
+                return -EINVAL;
+
+        dev = set->crtc->dev;
+
+        ret = pm_runtime_get_sync(dev->dev);
+        if (ret < 0)
+                return ret;
+
+        ret = drm_crtc_helper_set_config(set);
+
+        list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+                if (crtc->enabled)
+                        active = true;
+
+        pm_runtime_mark_last_busy(dev->dev);
+
+        rdev = dev->dev_private;
+        /* if we have active crtcs and we don't have a power ref,
+           take the current one */
+        if (active && !rdev->have_disp_power_ref) {
+                rdev->have_disp_power_ref = true;
+                return ret;
+        }
+        /* if we have no active crtcs, then drop the power ref
+           we got before */
+        if (!active && rdev->have_disp_power_ref) {
+                pm_runtime_put_autosuspend(dev->dev);
+                rdev->have_disp_power_ref = false;
+        }
+
+        /* drop the power reference we got coming in here */
+        pm_runtime_put_autosuspend(dev->dev);
+        return ret;
+}
 static const struct drm_crtc_funcs radeon_crtc_funcs = {
         .cursor_set = radeon_crtc_cursor_set,
         .cursor_move = radeon_crtc_cursor_move,
         .gamma_set = radeon_crtc_gamma_set,
-        .set_config = drm_crtc_helper_set_config,
+        .set_config = radeon_crtc_set_config,
         .destroy = radeon_crtc_destroy,
         .page_flip = radeon_crtc_page_flip,
 };
diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
index 59f067e857db..9902ac76f683 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.c
+++ b/drivers/gpu/drm/radeon/radeon_drv.c
@@ -36,8 +36,9 @@
 #include <drm/drm_pciids.h>
 #include <linux/console.h>
 #include <linux/module.h>
-
-
+#include <linux/pm_runtime.h>
+#include <linux/vga_switcheroo.h>
+#include "drm_crtc_helper.h"
 /*
  * KMS wrapper.
  * - 2.0.0 - initial interface
@@ -87,8 +88,8 @@ void radeon_driver_postclose_kms(struct drm_device *dev,
                                  struct drm_file *file_priv);
 void radeon_driver_preclose_kms(struct drm_device *dev,
                                 struct drm_file *file_priv);
-int radeon_suspend_kms(struct drm_device *dev, bool suspend);
-int radeon_resume_kms(struct drm_device *dev, bool resume);
+int radeon_suspend_kms(struct drm_device *dev, bool suspend, bool fbcon);
+int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon);
 u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc);
 int radeon_enable_vblank_kms(struct drm_device *dev, int crtc);
 void radeon_disable_vblank_kms(struct drm_device *dev, int crtc);
@@ -136,9 +137,11 @@ void radeon_debugfs_cleanup(struct drm_minor *minor);
 #if defined(CONFIG_VGA_SWITCHEROO)
 void radeon_register_atpx_handler(void);
 void radeon_unregister_atpx_handler(void);
+bool radeon_is_px(void);
 #else
 static inline void radeon_register_atpx_handler(void) {}
 static inline void radeon_unregister_atpx_handler(void) {}
+static inline bool radeon_is_px(void) { return false; }
 #endif
 
 int radeon_no_wb;
@@ -161,6 +164,7 @@ int radeon_lockup_timeout = 10000;
 int radeon_fastfb = 0;
 int radeon_dpm = -1;
 int radeon_aspm = -1;
+int radeon_runtime_pm = -1;
 
 MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers");
 module_param_named(no_wb, radeon_no_wb, int, 0444);
@@ -222,6 +226,9 @@ module_param_named(dpm, radeon_dpm, int, 0444);
 MODULE_PARM_DESC(aspm, "ASPM support (1 = enable, 0 = disable, -1 = auto)");
 module_param_named(aspm, radeon_aspm, int, 0444);
 
+MODULE_PARM_DESC(runpm, "PX runtime pm (1 = force enable, 0 = disable, -1 = PX only default)");
+module_param_named(runpm, radeon_runtime_pm, int, 0444);
+
 static struct pci_device_id pciidlist[] = {
         radeon_PCI_IDS
 };
@@ -258,6 +265,7 @@ static int radeon_resume(struct drm_device *dev)
         return 0;
 }
 
+
 static const struct file_operations radeon_driver_old_fops = {
         .owner = THIS_MODULE,
         .open = drm_open,
@@ -356,28 +364,121 @@ static int radeon_pmops_suspend(struct device *dev)
 {
         struct pci_dev *pdev = to_pci_dev(dev);
         struct drm_device *drm_dev = pci_get_drvdata(pdev);
-        return radeon_suspend_kms(drm_dev, 1);
+        return radeon_suspend_kms(drm_dev, true, true);
 }
 
 static int radeon_pmops_resume(struct device *dev)
 {
         struct pci_dev *pdev = to_pci_dev(dev);
         struct drm_device *drm_dev = pci_get_drvdata(pdev);
-        return radeon_resume_kms(drm_dev, 1);
+        return radeon_resume_kms(drm_dev, true, true);
 }
 
 static int radeon_pmops_freeze(struct device *dev)
 {
         struct pci_dev *pdev = to_pci_dev(dev);
         struct drm_device *drm_dev = pci_get_drvdata(pdev);
-        return radeon_suspend_kms(drm_dev, 0);
+        return radeon_suspend_kms(drm_dev, false, true);
 }
 
 static int radeon_pmops_thaw(struct device *dev)
 {
         struct pci_dev *pdev = to_pci_dev(dev);
         struct drm_device *drm_dev = pci_get_drvdata(pdev);
-        return radeon_resume_kms(drm_dev, 0);
+        return radeon_resume_kms(drm_dev, false, true);
+}
+
+static int radeon_pmops_runtime_suspend(struct device *dev)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+        struct drm_device *drm_dev = pci_get_drvdata(pdev);
+        int ret;
+
+        if (radeon_runtime_pm == 0)
+                return -EINVAL;
+
+        drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
+        drm_kms_helper_poll_disable(drm_dev);
+        vga_switcheroo_set_dynamic_switch(pdev, VGA_SWITCHEROO_OFF);
+
+        ret = radeon_suspend_kms(drm_dev, false, false);
+        pci_save_state(pdev);
+        pci_disable_device(pdev);
+        pci_set_power_state(pdev, PCI_D3cold);
+        drm_dev->switch_power_state = DRM_SWITCH_POWER_DYNAMIC_OFF;
+
+        return 0;
+}
+
+static int radeon_pmops_runtime_resume(struct device *dev)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+        struct drm_device *drm_dev = pci_get_drvdata(pdev);
+        int ret;
+
+        if (radeon_runtime_pm == 0)
+                return -EINVAL;
+
+        drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
+
+        pci_set_power_state(pdev, PCI_D0);
+        pci_restore_state(pdev);
+        ret = pci_enable_device(pdev);
+        if (ret)
+                return ret;
+        pci_set_master(pdev);
+
+        ret = radeon_resume_kms(drm_dev, false, false);
+        drm_kms_helper_poll_enable(drm_dev);
+        vga_switcheroo_set_dynamic_switch(pdev, VGA_SWITCHEROO_ON);
+        drm_dev->switch_power_state = DRM_SWITCH_POWER_ON;
+        return 0;
+}
+
+static int radeon_pmops_runtime_idle(struct device *dev)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+        struct drm_device *drm_dev = pci_get_drvdata(pdev);
+        struct drm_crtc *crtc;
+
+        if (radeon_runtime_pm == 0)
+                return -EBUSY;
+
+        /* are we PX enabled? */
+        if (radeon_runtime_pm == -1 && !radeon_is_px()) {
+                DRM_DEBUG_DRIVER("failing to power off - not px\n");
+                return -EBUSY;
+        }
+
+        list_for_each_entry(crtc, &drm_dev->mode_config.crtc_list, head) {
+                if (crtc->enabled) {
+                        DRM_DEBUG_DRIVER("failing to power off - crtc active\n");
+                        return -EBUSY;
+                }
+        }
+
+        pm_runtime_mark_last_busy(dev);
+        pm_runtime_autosuspend(dev);
+        /* we don't want the main rpm_idle to call suspend - we want to autosuspend */
+        return 1;
+}
+
+long radeon_drm_ioctl(struct file *filp,
+                      unsigned int cmd, unsigned long arg)
+{
+        struct drm_file *file_priv = filp->private_data;
+        struct drm_device *dev;
+        long ret;
+        dev = file_priv->minor->dev;
+        ret = pm_runtime_get_sync(dev->dev);
+        if (ret < 0)
+                return ret;
+
+        ret = drm_ioctl(filp, cmd, arg);
+        
+        pm_runtime_mark_last_busy(dev->dev);
+        pm_runtime_put_autosuspend(dev->dev);
+        return ret;
 }
 
 static const struct dev_pm_ops radeon_pm_ops = {
@@ -387,13 +488,16 @@ static const struct dev_pm_ops radeon_pm_ops = {
         .thaw = radeon_pmops_thaw,
         .poweroff = radeon_pmops_freeze,
         .restore = radeon_pmops_resume,
+        .runtime_suspend = radeon_pmops_runtime_suspend,
+        .runtime_resume = radeon_pmops_runtime_resume,
+        .runtime_idle = radeon_pmops_runtime_idle,
 };
 
 static const struct file_operations radeon_driver_kms_fops = {
         .owner = THIS_MODULE,
         .open = drm_open,
         .release = drm_release,
-        .unlocked_ioctl = drm_ioctl,
+        .unlocked_ioctl = radeon_drm_ioctl,
         .mmap = radeon_mmap,
         .poll = drm_poll,
         .read = drm_read,
diff --git a/drivers/gpu/drm/radeon/radeon_drv.h b/drivers/gpu/drm/radeon/radeon_drv.h
index b369d42f7de5..543dcfae7e6f 100644
--- a/drivers/gpu/drm/radeon/radeon_drv.h
+++ b/drivers/gpu/drm/radeon/radeon_drv.h
@@ -113,6 +113,9 @@
 #define DRIVER_MINOR            33
 #define DRIVER_PATCHLEVEL       0
 
+long radeon_drm_ioctl(struct file *filp,
+                      unsigned int cmd, unsigned long arg);
+
 /* The rest of the file is DEPRECATED! */
 #ifdef CONFIG_DRM_RADEON_UMS
 
diff --git a/drivers/gpu/drm/radeon/radeon_ioc32.c b/drivers/gpu/drm/radeon/radeon_ioc32.c
index c180df8e84db..bdb0f93e73bc 100644
--- a/drivers/gpu/drm/radeon/radeon_ioc32.c
+++ b/drivers/gpu/drm/radeon/radeon_ioc32.c
@@ -418,7 +418,7 @@ long radeon_kms_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long
         if (nr < DRM_COMMAND_BASE)
                 return drm_compat_ioctl(filp, cmd, arg);
 
-        ret = drm_ioctl(filp, cmd, arg);
+        ret = radeon_drm_ioctl(filp, cmd, arg);
 
         return ret;
 }
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index cc9e8482cf30..ec6240b00469 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -32,6 +32,8 @@
 #include "radeon.h"
 #include "atom.h"
 
+#include <linux/pm_runtime.h>
+
 #define RADEON_WAIT_IDLE_TIMEOUT 200
 
 /**
@@ -47,8 +49,12 @@ irqreturn_t radeon_driver_irq_handler_kms(DRM_IRQ_ARGS)
 {
         struct drm_device *dev = (struct drm_device *) arg;
         struct radeon_device *rdev = dev->dev_private;
+        irqreturn_t ret;
 
-        return radeon_irq_process(rdev);
+        ret = radeon_irq_process(rdev);
+        if (ret == IRQ_HANDLED)
+                pm_runtime_mark_last_busy(dev->dev);
+        return ret;
 }
 
 /*
diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index d6b36766e8c9..bb8710531a1b 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -32,7 +32,7 @@
 
 #include <linux/vga_switcheroo.h>
 #include <linux/slab.h>
-
+#include <linux/pm_runtime.h>
 /**
  * radeon_driver_unload_kms - Main unload function for KMS.
  *
@@ -50,9 +50,14 @@ int radeon_driver_unload_kms(struct drm_device *dev)
 
         if (rdev == NULL)
                 return 0;
+
         if (rdev->rmmio == NULL)
                 goto done_free;
+
+        pm_runtime_get_sync(dev->dev);
+
         radeon_acpi_fini(rdev);
+        
         radeon_modeset_fini(rdev);
         radeon_device_fini(rdev);
 
@@ -125,9 +130,20 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
                                 "Error during ACPI methods call\n");
         }
 
+        if (radeon_runtime_pm != 0) {
+                pm_runtime_use_autosuspend(dev->dev);
+                pm_runtime_set_autosuspend_delay(dev->dev, 5000);
+                pm_runtime_set_active(dev->dev);
+                pm_runtime_allow(dev->dev);
+                pm_runtime_mark_last_busy(dev->dev);
+                pm_runtime_put_autosuspend(dev->dev);
+        }
+
 out:
         if (r)
                 radeon_driver_unload_kms(dev);
+
+
         return r;
 }
 
@@ -475,9 +491,14 @@ void radeon_driver_lastclose_kms(struct drm_device *dev)
 int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
 {
         struct radeon_device *rdev = dev->dev_private;
+        int r;
 
         file_priv->driver_priv = NULL;
 
+        r = pm_runtime_get_sync(dev->dev);
+        if (r < 0)
+                return r;
+
         /* new gpu have virtual address space support */
         if (rdev->family >= CHIP_CAYMAN) {
                 struct radeon_fpriv *fpriv;
@@ -506,6 +527,9 @@ int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
 
                 file_priv->driver_priv = fpriv;
         }
+
+        pm_runtime_mark_last_busy(dev->dev);
+        pm_runtime_put_autosuspend(dev->dev);
         return 0;
 }